CN105143804A - An end port regenerative furnace - Google Patents
An end port regenerative furnace Download PDFInfo
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- CN105143804A CN105143804A CN201480010145.8A CN201480010145A CN105143804A CN 105143804 A CN105143804 A CN 105143804A CN 201480010145 A CN201480010145 A CN 201480010145A CN 105143804 A CN105143804 A CN 105143804A
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- Prior art keywords
- spray gun
- regenerator
- pattern
- combustion chamber
- oxygen
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/20—Arrangements of heating devices
- F27B3/205—Burners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/26—Arrangements of heat-exchange apparatus
- F27B3/263—Regenerators
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/235—Heating the glass
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/235—Heating the glass
- C03B5/2353—Heating the glass by combustion with pure oxygen or oxygen-enriched air, e.g. using oxy-fuel burners or oxygen lances
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/235—Heating the glass
- C03B5/237—Regenerators or recuperators specially adapted for glass-melting furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
- F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/20—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/22—Arrangements of air or gas supply devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/22—Arrangements of air or gas supply devices
- F27B3/225—Oxygen blowing
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2211/00—Heating processes for glass melting in glass melting furnaces
- C03B2211/30—Heating processes for glass melting in glass melting furnaces introducing oxygen into the glass melting furnace separately from the fuel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Air Supply (AREA)
- Combustion Of Fluid Fuel (AREA)
- Glass Melting And Manufacturing (AREA)
Abstract
An end-port regenerative furnace (10) includes a housing; a combustion chamber (14) within the housing; first and second regenerators (24, 26) each disposed to be in communication with the combustion chamber; and first and second lance assemblies (20, 22) adapted to inject pure fuel gas and pure oxygen concurrent into the half of the combustion chamber closest to a discharge end with a respective one of the first and second regenerators. The first and second regenerators are each constructed and arranged to alternate between a combustion mode and an exhaust mode for the combustion products circulating in the combustion chamber.
Description
The present invention relates to a kind of formation in order to reduce NOx and increase the glass melting regenerative furnace of glass melting ability.
The concern of legislation and various circles of society requires to reduce NOx level.Oxygen is used to be the option reducing described level to complete glass melting.
This type of smelting furnace a kind of is open in WO2010/114714.Which disclose fuel burner, it is upper or close to heat spot that this burner is preferably placed in the heat spot (hotspot) of smelting furnace, and be preferably namely positioned at substoichiometric burner port downstream to form combustion flame rich operating fuel through operation.Another one fuel burner is arranged in farther downstream, and it runs with hyperstoichiometry and oxygen enrichment.In practice, these two kinds of fuel burners are preferably placed in the opposing sidewalls of the smelting furnace before the liquid glass port of export.Oil or gas can be used as fuel.The use of the burner that fuel-rich material, substoichiometric run causes the expansion of fuel rich area in smelting furnace, and the formation of NOx is reduced, in default of oxygen and because of producing CO.Due in farther downstream and therefore in the exhaust gas side direction of smelting furnace, therefore, the fuel burner that second oxygen enrichment and thus hyperstoichiometry run can guarantee that waste gas mixes with the thorough of oxygen enriched flame, and therefore guarantees the most possible second-time burning of imperfect combustion propellant composition.Two fuel burners (also referred to as " heat spot burner ") are preferably arranged opposite to each other and are being arranged in the 3rd longitudinal wall in the farther downstream of smelting furnace, and are therefore arranged in the inverse u-shaped region of the combustion-gas flow of smelting furnace.Run (or vice versa) because fuel burner is switched to hyperstoichiometry from substoichiometric, the smelting furnace replaced runs and is easy to accomplish.
Find that this smelting furnace provides the NOx waste gas value obviously reduced.
The research and development of this conception are disclosed in EP2508827.In the case, can be the feed end that the other air-flow of pure oxygen is injected into smelting furnace.This gas mixes with the good of burning gases to provide to introduce at a high speed, thus reduces flame temperature, causes reducing NOx concentration further.
According to a first aspect of the invention, the smelting furnace defined in claim 1 is which provided.
The present invention effectively adopt with describe in EP2508827 spray the contrary method of the method for pure air-flow at the other end of combustion chamber.Patent EP2508827 discloses the layout of modified hotspot location, and this is adversely forced to need to use heat spot burner to provide acceptable Temperature Distribution.This needs to use more oxygen.The spray gun pure fuel gas and purity oxygen being ejected into heat spot region is installed, causes the corresponding increase of remarkable minimizing or the handling capacity consumed energy.By spraying pure gas stream at heat spot, improve the temperature of wall with flues and the control of wall with flues own temperature.Known, oxygen or at least high partial pressures/concentration at glass surface will produce the froth bed by glass and heat transfer isolation.On the contrary, reducing zone will suppress froth bed.Then, gas will reduce froth bed at the U-shaped flame of roasting side, will pass through the invisible flame combustion of pure oxygen on the former batch of material not being problem that bubbles subsequently.
In order to reach best orientation, the first spray gun assembly and the second spray gun assembly are arranged in the opposing sidewalls of shell separately.Alternatively, two spray gun assemblies can be arranged on the top of shell.
Preferably, the first spray gun assembly and the second spray gun assembly be arranged on separately be less than 40%, be preferably less than 1/3rd and be more preferably less than 1/4th the path along combustion chamber from discharge end to feed end.Spray gun is placed in the position closer to heat spot by this.
Each first spray gun assembly and the second spray gun assembly can comprise single spray gun.But, preferably, at least one in the first spray gun assembly and/or the second spray gun assembly comprises multiple spray gun.
Spray gun can be configured so that they can only run in pure fuel gas or pure oxygen operational mode.But, preferably, at least one in the first spray gun assembly and the second spray gun assembly is through arranging to run in rich fuel gas and/or oxygen enrichment pattern.This allows larger operational flexibility.
At least one in first spray gun assembly and the second spray gun assembly can have the independent pipeline for burner oil gas and oxygen.In the case, the supply of two kinds of gases can keep separating completely.Alternatively, at least one in the first spray gun assembly and the second spray gun assembly has the common conduit for burner oil gas and oxygen.The each gas of this type of layout requirements is fed to common conduit respectively.
According to a second aspect of the invention, it provides the method as defined in claims 9.
The time interval is preferably 10 to 30 minutes.Preferably, and do not have pure oxygen or pure fuel to be ejected into the 3rd combustion chamber closest to feed end, to avoid adverse effect heat spot.
For more complete understanding embodiment of the present invention, can with reference to the description of following accompanying drawing together with embodiment, wherein:
Fig. 1 is the schematic diagram that system implementation plan of the present invention is shown; And
Fig. 2 is another schematic diagram that system implementation plan of the present invention is shown.
Smelting furnace of the present invention and system implementation plan increase the handling capacity (stretching) of glass and reduce the NOx amount formed in glass furnace such as such as port regenerative furnace.
This smelting furnace and system implementation plan provide partial roasting/spray oxygen with the heat trnasfer being increased to heat spot to make the handling capacity (stretchings) of glass increase and the effective means of minimizing NOx level at roasting side direction smelting furnace burner oil gas and in discharge side.
With reference to Fig. 1 and 2, smelting furnace of the present invention usually shows to be 10, and it has adopted system implementation plan of the present invention.Smelting furnace 10 comprises through structure and arranges with the outer wall 12 providing internal combustion chamber 14.
Feeder 16,18 is connected to smelting furnace 10 to be communicated with combustion chamber 14, to smelting furnace 10 and particularly combustion chamber 14 provides bare glass to form material or other charge material (not shown).
Oxy-fuel burners can be positioned at position similar with shown position 20 and 22 in smelting furnace to increase extensibility, and this is well-known to those skilled in the art.The implication of roasting oxy-fuel burners in this region produces foam due to the local high partial pressures/concentration of oxygen.During smelting furnace reversion, it is very common that oxy-fuel burners injection oxygen and fuel continue to run.
The downstream of smelting furnace 10 comprises outlet 11 or discharges the smelting furnace end of molten glass, is often called throat.A pair spray gun 20,22 be arranged for the downstream downstream of combustion chamber (that is, in) of smelting furnace 10 run spray gun 20 may be used for spraying when once reversing (roasting side) 100% fuel gas and for spraying oxygen during in another reversion (discharge side).Spray gun 22 is also arranged on the downstream of smelting furnace 10, and such as the opposite side of furnace wall 12 as shown in drawings, makes the discharge of spray gun 22 align with spray gun 20.Spray gun 22 may be used for once reverse (roasting side) time spray 100% fuel gas and for another reversion (discharge side) time spray oxygen.Two spray guns 20,22 are used for circular flow through structure and layout.In other words, spray gun 20,22 can with fuel-rich combustion device or oxidation burners alternate run.
In one end of the relative exhaust outlet 11 of smelting furnace 10, arrange usually show for a pair be 24,26 regenerator.Each regenerator 24,26 is connected to corresponding ports, and each port is communicated with combustion chamber 14.In other words, regenerator 24 is connected to port 24A.Regenerator 26 is connected to port 26A.Regenerator 24,26 has the fuel injector (not shown) at port 24A, 26A, and this fuel injector needs to run with oil or gaseous fuel according to fusing application.The regenerator and the flowing of port and the operation of smelting furnace 10 that associate relative to their is indicated at the arrow of port 24A, 26A.
Operationally (namely, do not comprise each regenerator 24,26 is switched to roasting short time span from exhaust, and vice versa), one in regenerator 24,26 at roasting (at roasting mouth), and in regenerator 24,26 another exhaust (at exhaust outlet).Each port 24A, 26A are furnished with fuel injector (not shown), and this fuel injector only has and runs when the correspondence one of this port is in roasting pattern.When being in roasting pattern, combustion air flows through regenerator and preheated, makes it possible to achieve the combustion temperatures of the Effec-tive Function for smelting furnace 10.Preheat air and flow through roasting port and in flowing in combustion chamber 14, in combustion chamber 14, preheat air with from fuel injector roasting port fuel reaction thus form flame.Flame heated crucible structure and glass (not shown) to be melted.Hot heater exhaust is sent in the second regenerator by floss hole, and the second regenerator is heated through out-of-date at these gases.At 10-30 minute (more at large, 15-25 minute) a period of time after, be inverted by the gas flowing of this port, combustion air is made to flow through now preheating regenerator (namely, a regenerator of previous discharge) and hot heater exhaust flow out now and flow through hot poor regenerator (namely, a regenerator of previous roasting), to reclaim wasted energy.
More specifically and with reference to figure 1, operationally, the charging that the bare glass from feeder 16,18 represented by arrow 17 forms material is supplied to the combustion chamber 14 of smelting furnace 10, and regenerator 24 provides the flame entering combustion chamber 14 for melting this charging at the burner place of its port 24A.When activateding at the burner of port 24A, spray gun 20 roasting mouth 24A run time durations with fuel gas mode operation.The burning footprints 25 or main flame that are usually used for regenerator 24 are shown.Concurrent therewith, spray gun 22 is with oxygen mode operation, so that any imperfect combustion remaining any fuel burnt as far as possible completely from fuel gas 20 and the burner at port 24A place.After this, combustion product stream 27 is removed by the port 26A of regenerator 26.
Before the process discussed about Fig. 2 is below reversed, this process will run about 15-25 minute.
With reference to figure 2, above about in the exhausted select time amount time of such as such as 20 minutes of the operation described in Fig. 1, regenerator 26 runs under being set in now roasting pattern, and regenerator 24 setting now runs in a drain mode.To take fire to form flame in combustion chamber 14 at the burner at regenerator port 26A place, and will extinguish at the burner at regenerator port 24A place.Concurrent therewith, spray gun 22 will with fuel gas mode operation (non-oxide), and spray gun 20 will be switched to oxidation model, makes to have sufficient oxygen in combustion chamber 14 with any afterburning product that burns.The burning footprints 29 or main flame that are usually used for regenerator 26 are shown.When regenerator 24 is in discharge mode, produce the combustion product stream represented by arrow 31 from combustion chamber 14.Air-flow 31 is removed by the port 24A of regenerator 24.After select time amount, this process is inverted to the process discussed about Fig. 1.
Spray gun 20,22 can be arranged in breast wall, in other words, is parallel to the side in initial flame direction and/or the top of smelting furnace of regenerator 24,26 along smelting furnace 10.Alternatively, spray gun 20,22 can be arranged in end wall 12 as shown in Figure 20 A, 22A, that is, relative with port 24A, 26A and near exhaust outlet 11.But they may not be arranged on any position different from the smelting furnace half (linear measure longimetry along smelting furnace) closest to wall 12.
Spray gun 28,30 illustrates the approximate location of this type of spray gun at smelting furnace 10 top.Can use along furnace top one or more spray gun 28,30 arranged in pairs.
Given smelting furnace may have the combination of the spray gun 28,30 of chest furnace wall 20,22 and top installation.This has the advantage providing better mixing and follow-up fuel and oxygen stream highly effective reaction.Such as, in fig. 2, when port 26 is in roasting pattern, from spray gun 20 and spray gun 28 oxygen stream and more effectively will react in stove 14 with combustion product stream 31 from the fuel gas stream of spray gun 22 and spray gun 30.This is because be no matter that oxidation spray gun 20,28 or fuel gas spray gun 22,30 are substantially mutually vertical but also perpendicular to the main combustion product stream 31 in the burner in port 26A and smelting furnace 14.
In the present invention, will run with fuel gas at any spray gun of the roasting side of smelting furnace, and will run with oxygen at the spray gun of exhaust side.
In a word, will have in fuel gas mode namely to be not enough to the spray gun of the oxygen roasting of burning completely in the roasting side of smelting furnace 10.At smelting furnace 10 for discharging the opposite side of combustion product, i.e. the waste side of this smelting furnace, at the spray gun of opposite side by imperfect combustion any fuel remainder of this smelting furnace roasting side of burning as far as possible completely with oxygen.Circulation between regenerator 24,26 and spray gun 20,22 can be carried out with the time interval of such as 15-25 minute.
Every side in the roasting side and waste side of smelting furnace 10 is run by least one in spray gun 20,22.This type of spray gun 20,22 should with exhaust outlet 24A, 26A separates fully, so that the excess of fuel coming self-thermo furnace 10 roasting side has with the excess of oxygen of oxygen lance come in self-thermo furnace 10 waste side the grace time and space that can be used for reacting.In addition, fuel gas spray gun can be arranged on the roasting side of smelting furnace 10, and the Free Region in its burning footprints 25,29 through being positioned at the peak temperature region of smelting furnace 10 and smelting furnace form fuel-rich material mixture to heat spot.
Fuel gas spray gun and oxygen lance 20,22 are arranged on the half position of smelting furnace closest to wall 12.In this position, top temperature is in or close to they maximums in smelting furnace 10, it is commonly referred to the heat spot in stove.At heat spot, usually there is low-density to heat glass and gush from (not shown) bottom smelting furnace 10.Glass guide channel (not shown) at heat spot place on the surface, glass be further heated and on gush glass be forced to part pour into roasting mouth 24A and exhaust outlet 26A, and part pour into glass floss hole 11 or throat.The surface pouring into the molten glass of roasting mouth 24A and exhaust outlet 26A is moved and is contributed to before described batch of material fully melts, limit the movement that glass floss hole 11 poured into by any batch of material.Glass this on gush and thus the smelting furnace high-performance that causes in glass guide channel run needed for maintain heat spot promote flowing through.By being used in heat spot place or close to the fuel gas of heat spot and oxygen lance 20,22, extra energy is directly transferred to the heat spot of expectation, thus smelting furnace is kept to run the position of the heat spot of During firing cycles.Smelting furnace stability is by keeping and controlling heat spot to improve.Heat spot is the active position for adding the oxygen-fuel energy from fuel gas and oxygen lance, because its improves in addition or strengthens the natural fusion process in the combustion chamber 14 of smelting furnace.
But before furnace roof superstructure excessive temperature rises, the maximum of oxygen-fuel energy can be introduced in heat spot.In addition, the flow path of combustion product 27,31 represents that this flow path be directed into close to the fuel rich area the roasting side of heat spot from the spray gun 20 of Fig. 1, this fuel gas region will be limited in relatively short region, because fuel-rich combustion product skims over the combustion chamber 14 of flow path 27,31.
About the NOx in this type systematic, because part anoxic inhibits the formation of NOx in fuel-rich regions, therefore, if the size of fuel rich area is increased, then the final quantity of produced NOx will reduce.Therefore, formed to reduce NOx, the size of fuel rich area will increase, and this realizes closer to the fuel gas of roasting mouth and exhaust outlet 24A, 26A and oxygen lance 20,22 by using.
The result run as needing fuel-efficient, substantially completed combustion reaction before combustion product 27,31 is discharged to corresponding exhaust outlet 24A, 26A.Therefore, the additional energy from fuel gas and oxygen lance is not introduced to close to exhaust outlet, because burning occurs and completes burning to need room and time.In addition, the fuel-rich combustion product following path 27,31 needs as far as possible fully to mix at the exhaust side of smelting furnace with oxygen-rich stream, interact and react, so that the excess of fuel in fuel-rich combustion product falls at smelting furnace internal consumption as far as possible.
Use fuel gas and oxygen lance 20,22 by mode stage by stage, smelting furnace of the present invention and system will reduce the NOx emission from (such as) smelting furnace port.This system avoids the secondary NOx suppression equipment with high costs needing to be installed to smelting furnace 10.
Utilize the oxygen in smelting furnace, the productivity ratio of smelting furnace 10 can be increased further, and allow smelting furnace to continue when primary air-fuel combustion worsens to run.Use the embodiment of this system, reduce the impact of NOx discharge, allow the larger utilization rate of furnace equipment and bring client more profit, avoiding improving to smelting furnace or repairing relevant Capital expenditure simultaneously.
Spray gun 20,22 is switched to from fuel gas the needs that oxygen can avoid opening or closing spray gun 20,22, and therefore reduces the thermal cycle of parts and the needs for spray gun 20,22 cooling twice medium that may cause losing efficacy.
Oxy-fuel burners can be positioned at position similar with shown position 20 and 22 in smelting furnace to increase extensibility, and this is well-known to those skilled in the art.The implication of roasting oxy-fuel burners in this region produces foam due to the local high partial pressures/concentration of oxygen.The impact increasing froth bed is isolation glass body and reduces heat trnasfer.During smelting furnace reversion, it is very common that oxy-fuel burners injection oxygen and fuel continue to run.Decrease the dividing potential drop of localized concentration and oxygen at the fuel gas of this area spray 100% and form the fuel-rich regions localized in heat spot position.The little localized areas of this fuel has and suppresses froth bed thus reduce insulation effect and increase the effect of heat trnasfer.The bulk gas sprayed is separated into carbon and OH free radical, and they are being adjacent to the position burning of bridge wall 15.This fuel gas is provided to the extra heat of bridge wall 15 and is the means of supplementing out economy controlling this temperature.This temperature affects by depth of foam degree, and clearly, froth bed is thinner, and the heat be radiated glass from wall 15 is more.
Oxy-fuel burners can be positioned at position similar with shown position 20 and 22 in smelting furnace to increase extensibility, and this is well-known to those skilled in the art.When port burner does not have fuel, these burners continue roasting usually during smelting furnace reversion.The clean effect in air ambient with oxy-fuel burners increases NOx during reversing.In this example, during reversing, spray gun 20 and 22 can run in fuel gas pattern (that is, only having fuel gas), and as a result, NOx significantly reduces in this position.
Spray gun 20 and 22 have be unitary catheter or alternative be two different one, conduits for fuel gas and another for oxygen may.
Furnace efficiency is directly proportional to excess of oxygen, and this is known to those skilled in the art.In this example, the excess of oxygen in exhaust regenerator may be used for the oxygen of combustion air and/or injection.The volume of oxygen is larger, and the volume of combustion air is less.The volume of combustion air is less, and the classification of main fuel burner is more.
The classification of burner is more, and NOx is fewer, and heat trnasfer is more usually.Add the flowing that oxygen reduces combustion air, which increase air preheat.The volume that combustion air reduces will postpone the mixing of main natural gas.The natural gas sprayed by spray gun 20 is secondary fuel classification, burns to be completed by secondary oxygen stream 22.This system utilizes fuel and oxygen classification.
In nearest case study, there is the end-roaster being greater than 200MTPD and adopt this layout to run.Spray the natural gas of about 5% by spray gun 20 and realize record-breaking stretching at the oxygen that exhaust spray gun 22 sprays equating volume.This achieve the maximum tension record than previous maximum high about 3%.This maximum tension realizes with the NOx reducing suitable 20% capacity.
Claims (12)
1. a port regenerative furnace, it comprises:
Shell;
Be arranged on the combustion chamber in described shell;
The feed end be associated with described burner;
At the first port and second port at described shell place, its for the described combustion chamber at described feed end place;
Be associated with described combustion chamber and the discharge end separated with described feed end;
Be arranged on described feed end and by the first regenerator of described first port and described combustion chamber, described first regenerator is adapted at circular flow between roasting pattern and exhaust mode, wherein, in described roasting pattern, fuel is through spraying the pre-heated combustion air close to entering described combustion chamber through described first port, in described exhaust mode, combustion product is discharged from described combustion chamber by described first port;
Be arranged on described combustion chamber half and closest to the first spray gun assembly of described discharge end, described first spray gun assembly be suitable for only burner oil gas fuel gas pattern and and the concurrent oxygen pattern of only spraying oxygen of the circular flow of described first regenerator between circular flow;
Be arranged on described discharge end and by the second regenerator of described second port and described combustion chamber, described second regenerator is suitable for circular flow between roasting pattern and exhaust mode, wherein, in described roasting pattern, fuel is through spraying the pre-heated combustion air close to entering described combustion chamber through described first port, in described exhaust mode, combustion product is discharged from described combustion chamber by described first port; And
Be arranged on described combustion chamber half and closest to the second spray gun assembly of described discharge end, described second spray gun assembly be suitable for only burner oil gas fuel gas pattern and and the concurrent oxygen pattern of only spraying oxygen of the circular flow of described second regenerator between circular flow;
Wherein, described first spray gun assembly can run in the fuel gas pattern concurrent with the roasting pattern of described first regenerator, to provide fuel-rich combustion and the fuel-rich combustion product stream in described combustion chamber, and described second ejection assemblies can run in the oxygen pattern concurrent with the exhaust mode of described second regenerator, to provide with the aitiogenic extra oxygen of described fuel-rich combustion product reaction stream and to form exhaust stream from described combustion chamber; Described first spray gun assembly then can run in described oxygen pattern and described first regenerator can run in described exhaust mode, and described second spray gun assembly can run in described fuel gas pattern and described second regenerator can run to be reversed in the combustion flow in described combustion chamber and exhaust stream that circulate between described first regenerator and the second regenerator in described roasting pattern.
2. regenerative furnace according to claim 1, wherein, described first spray gun assembly and the second spray gun assembly are arranged on the opposing sidewalls of described housing separately.
3. regenerative furnace according to claim 1, wherein, described first spray gun assembly and the second spray gun assembly are arranged on the top of described housing separately.
4. regenerative furnace according to claim 1, wherein, described first spray gun assembly and the second spray gun assembly be arranged on separately be less than 40%, be preferably less than 1/3rd and be more preferably less than 1/4th along described combustion chamber from described discharge end to the path of feed end.
5. according to the regenerative furnace of aforementioned arbitrary claim, wherein, described first spray gun assembly and/or the second spray gun assembly comprise multiple spray gun.
6. the regenerative furnace according to any one in aforementioned claim, wherein, at least one in described first spray gun assembly and the second spray gun assembly is run in rich fuel gas and/or oxygen enrichment pattern through being arranged in.
7. the regenerative furnace according to any one in aforementioned claim, wherein, at least one in described first spray gun assembly and the second spray gun assembly has the individual conduits for burner oil G&O.
8. the regenerative furnace according to any one in claim 1-6, wherein, at least one in described first spray gun assembly and the second spray gun assembly has the shared conduit for burner oil G&O.
9. one kind is run the method for port regenerative furnace, described port regenerative furnace has combustion chamber and has the first regenerator and the second regenerator in discharge end, each in described first regenerator and the second regenerator can be run in roasting pattern and exhaust mode, and described method comprises:
Half in described combustion chamber also provides the first spray gun farthest away from described discharge end, described first spray gun only burner oil gas fuel gas pattern and and can the running between the concurrent oxygen pattern of only spraying oxygen of operational mode of described first regenerator;
Half in described combustion chamber also provides the second spray gun farthest away from described discharge end, described second spray gun only burner oil gas fuel gas pattern and and can the running between the concurrent oxygen pattern of only spraying oxygen of operational mode of described second regenerator;
In described roasting pattern, run described first regenerator and run the first burner in described fuel gas pattern;
In described exhaust mode, run described second regenerator and run the second spray gun in described oxygen pattern;
Alternately described first regenerator and the second regenerator and described first spray gun and the second spray gun can operational mode, wherein, described first regenerator can run in described exhaust mode, and described first spray gun can run in described fuel gas pattern, and described second regenerator can run in described roasting pattern, and described second spray gun can run in described oxygen pattern; And
The first regenerator described in continuous print time interval Inner eycle and the second regenerator and described first spray gun and the second spray gun can operational mode to provide circular flow between described first regenerator and the second regenerator.
10. method according to claim 9, wherein, the described time interval is between 10 minutes to 30 minutes.
11. according to claim 9 or method according to claim 10, wherein, in the 3rd combustion chamber not having pure oxygen or pure fuel gas to be injected into closest to described feed end.
12. methods according to any one in claim 5 to 11, wherein, During between modes, by two pure fuel gas of lance ejection.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1303283.4A GB2511115A (en) | 2013-02-25 | 2013-02-25 | An end port regenerative furnace |
| GB1303283.4 | 2013-02-25 | ||
| PCT/EP2014/053660 WO2014128311A1 (en) | 2013-02-25 | 2014-02-25 | An end port regenerative furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105143804A true CN105143804A (en) | 2015-12-09 |
Family
ID=48092025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480010145.8A Pending CN105143804A (en) | 2013-02-25 | 2014-02-25 | An end port regenerative furnace |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20160003543A1 (en) |
| EP (1) | EP2959248B1 (en) |
| KR (1) | KR20150123279A (en) |
| CN (1) | CN105143804A (en) |
| BR (1) | BR112015020192A2 (en) |
| GB (1) | GB2511115A (en) |
| MY (1) | MY178331A (en) |
| WO (1) | WO2014128311A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106636573A (en) * | 2016-12-28 | 2017-05-10 | 重庆市永川区益锐机械有限责任公司 | High-efficiency tempering furnace |
| CN111132941A (en) * | 2017-07-21 | 2020-05-08 | 能源集团 | Combustion method suitable for melting materials such as glass in an end-fired furnace |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX2017007896A (en) * | 2014-12-17 | 2017-10-18 | Pilkington Group Ltd | Furnace. |
| WO2018148478A1 (en) | 2017-02-13 | 2018-08-16 | Bloom Engineering Company Inc. | Dual mode regenerative burner system and a method of heating a furnace using a dual mode regenerative burner system |
| ES2955884T3 (en) * | 2017-03-15 | 2023-12-07 | Dfb Soria Llc | Topical therapy for the treatment of skin malignancies with taxane nanoparticles |
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- 2013-02-25 GB GB1303283.4A patent/GB2511115A/en not_active Withdrawn
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2014
- 2014-02-25 EP EP14708516.1A patent/EP2959248B1/en active Active
- 2014-02-25 BR BR112015020192A patent/BR112015020192A2/en not_active Application Discontinuation
- 2014-02-25 MY MYPI2015702791A patent/MY178331A/en unknown
- 2014-02-25 WO PCT/EP2014/053660 patent/WO2014128311A1/en active Application Filing
- 2014-02-25 CN CN201480010145.8A patent/CN105143804A/en active Pending
- 2014-02-25 KR KR1020157026090A patent/KR20150123279A/en not_active IP Right Cessation
- 2014-02-25 US US14/769,479 patent/US20160003543A1/en not_active Abandoned
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| US5779754A (en) * | 1995-07-06 | 1998-07-14 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process and horseshoe flame furnance for the melting of glass |
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| CN106636573A (en) * | 2016-12-28 | 2017-05-10 | 重庆市永川区益锐机械有限责任公司 | High-efficiency tempering furnace |
| CN111132941A (en) * | 2017-07-21 | 2020-05-08 | 能源集团 | Combustion method suitable for melting materials such as glass in an end-fired furnace |
| CN111132941B (en) * | 2017-07-21 | 2022-11-08 | 能源集团 | Combustion method suitable for melting materials such as glass in an end-fired furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| MY178331A (en) | 2020-10-08 |
| EP2959248B1 (en) | 2020-12-02 |
| GB201303283D0 (en) | 2013-04-10 |
| EP2959248A1 (en) | 2015-12-30 |
| BR112015020192A2 (en) | 2017-07-18 |
| WO2014128311A1 (en) | 2014-08-28 |
| GB2511115A (en) | 2014-08-27 |
| US20160003543A1 (en) | 2016-01-07 |
| KR20150123279A (en) | 2015-11-03 |
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